Lock



FIG. 1 is a front elevational view of a lock showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is an enlarged bottom plan view thereof;

FIG. 6 is an enlarged top plan view thereof;

FIG. 7 is a top, left and front perspective view thereof; and,

FIG. 8 is a bottom, right and rear perspective view thereof.

CLAIM The ornamental design for a lock, as shown and described.